1 /* `rm' file deletion utility for GNU.
2 Copyright (C) 88, 90, 91, 1994-2005 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Paul Rubin, David MacKenzie, and Richard Stallman.
19 Reworked to use chdir and avoid recursion by Jim Meyering. */
21 /* Implementation overview:
23 In the `usual' case, RM saves no state for directories it is processing.
24 When a removal fails (either due to an error or to an interactive `no'
25 reply), the failure is noted (see description of `ht' in remove.c's
26 remove_cwd_entries function) so that when/if the containing directory
27 is reopened, RM doesn't try to remove the entry again.
29 RM may delete arbitrarily deep hierarchies -- even ones in which file
30 names (from root to leaf) are longer than the system-imposed maximum.
31 It does this by using chdir to change to each directory in turn before
32 removing the entries in that directory.
34 RM detects directory cycles lazily. See lib/cycle-check.c.
36 RM is careful to avoid forming full file names whenever possible.
37 A full file name is formed only when it is about to be used -- e.g.
38 in a diagnostic or in an interactive-mode prompt.
40 RM minimizes the number of lstat system calls it makes. On systems
41 that have valid d_type data in directory entries, RM makes only one
42 lstat call per command line argument -- regardless of the depth of
48 #include <sys/types.h>
58 #include "root-dev-ino.h"
60 /* The official name of this program (e.g., no `g' prefix). */
61 #define PROGRAM_NAME "rm"
64 "Paul Rubin", "David MacKenzie, Richard Stallman", "Jim Meyering"
66 /* Name this program was run with. */
69 /* For long options that have no equivalent short option, use a
70 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
73 NO_PRESERVE_ROOT = CHAR_MAX + 1,
75 PRESUME_INPUT_TTY_OPTION
78 static struct option const long_opts[] =
80 {"directory", no_argument, NULL, 'd'},
81 {"force", no_argument, NULL, 'f'},
82 {"interactive", no_argument, NULL, 'i'},
84 {"no-preserve-root", no_argument, NULL, NO_PRESERVE_ROOT},
85 {"preserve-root", no_argument, NULL, PRESERVE_ROOT},
87 /* This is solely for testing. Do not document. */
88 /* It is relatively difficult to ensure that there is a tty on stdin.
89 Since rm acts differently depending on that, without this option,
90 it'd be harder to test the parts of rm that depend on that setting. */
91 {"-presume-input-tty", no_argument, NULL, PRESUME_INPUT_TTY_OPTION},
93 {"recursive", no_argument, NULL, 'r'},
94 {"verbose", no_argument, NULL, 'v'},
95 {GETOPT_HELP_OPTION_DECL},
96 {GETOPT_VERSION_OPTION_DECL},
100 /* Advise the user about invalid usages like "rm -foo" if the file
101 "-foo" exists, assuming ARGC and ARGV are as with `main'. */
104 diagnose_leading_hyphen (int argc, char **argv)
106 /* OPTIND is unreliable, so iterate through the arguments looking
107 for a file name that looks like an option. */
110 for (i = 1; i < argc; i++)
112 char const *arg = argv[i];
115 if (arg[0] == '-' && arg[1] && lstat (arg, &st) == 0)
118 _("Try `%s ./%s' to remove the file %s.\n"),
120 quotearg_n_style (1, shell_quoting_style, arg),
130 if (status != EXIT_SUCCESS)
131 fprintf (stderr, _("Try `%s --help' for more information.\n"),
135 char *base = base_name (program_name);
136 printf (_("Usage: %s [OPTION]... FILE...\n"), program_name);
138 Remove (unlink) the FILE(s).\n\
140 -f, --force ignore nonexistent files, never prompt\n\
141 -i, --interactive prompt before any removal\n\
144 --no-preserve-root do not treat `/' specially (the default)\n\
145 --preserve-root fail to operate recursively on `/'\n\
146 -r, -R, --recursive remove directories and their contents recursively\n\
147 -v, --verbose explain what is being done\n\
149 fputs (HELP_OPTION_DESCRIPTION, stdout);
150 fputs (VERSION_OPTION_DESCRIPTION, stdout);
153 By default, rm does not remove directories. Use the --recursive (-r or -R)\n\
154 option to remove each listed directory, too, along with all of its contents.\n\
158 To remove a file whose name starts with a `-', for example `-foo',\n\
159 use one of these commands:\n\
167 Note that if you use rm to remove a file, it is usually possible to recover\n\
168 the contents of that file. If you want more assurance that the contents are\n\
169 truly unrecoverable, consider using shred.\n\
171 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
177 rm_option_init (struct rm_options *x)
179 x->ignore_missing_files = false;
180 x->interactive = false;
181 x->recursive = false;
182 x->root_dev_ino = NULL;
183 x->stdin_tty = isatty (STDIN_FILENO);
186 /* Since this program exits immediately after calling `rm', rm need not
187 expend unnecessary effort to preserve the initial working directory. */
188 x->require_restore_cwd = false;
192 main (int argc, char **argv)
194 bool preserve_root = false;
198 initialize_main (&argc, &argv);
199 program_name = argv[0];
200 setlocale (LC_ALL, "");
201 bindtextdomain (PACKAGE, LOCALEDIR);
202 textdomain (PACKAGE);
204 atexit (close_stdout);
208 while ((c = getopt_long (argc, argv, "dfirvR", long_opts, NULL)) != -1)
213 /* Ignore this option, for backward compatibility with
214 coreutils 5.92. Some time after 2005, we'll change this
215 to report an error (or perhaps behave like FreeBSD does)
216 instead of ignoring the option. */
220 x.interactive = false;
221 x.ignore_missing_files = true;
225 x.interactive = true;
226 x.ignore_missing_files = false;
234 case NO_PRESERVE_ROOT:
235 preserve_root = false;
239 preserve_root = true;
242 case PRESUME_INPUT_TTY_OPTION:
250 case_GETOPT_HELP_CHAR;
251 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
253 diagnose_leading_hyphen (argc, argv);
254 usage (EXIT_FAILURE);
260 if (x.ignore_missing_files)
264 error (0, 0, _("missing operand"));
265 usage (EXIT_FAILURE);
269 if (x.recursive & preserve_root)
271 static struct dev_ino dev_ino_buf;
272 x.root_dev_ino = get_root_dev_ino (&dev_ino_buf);
273 if (x.root_dev_ino == NULL)
274 error (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
279 size_t n_files = argc - optind;
280 char const *const *file = (char const *const *) argv + optind;
282 enum RM_status status = rm (n_files, file, &x);
283 assert (VALID_STATUS (status));
284 exit (status == RM_ERROR ? EXIT_FAILURE : EXIT_SUCCESS);